#ifndef _PWM_H
#define _PWM_H
 
#include "stm32f10x.h"
#include "stm32f10x_tim.h" 

#define fre_20khz 1


void TIM1_PWM_Init(u16 per,u16 psc);
void TIM3_PWM_Init(u16 per,u16 psc);


#endif
